Article History
Received: 8 March 2020
Accepted: 22 April 2020
First Online: 29 April 2020
Ethics approval and consent to participate
: Each subject signed an informed written consent form. The Research Ethics Committee of Faculty of Dentistry, Cairo University revised and approved this research on 25/6/2019 with the number (19–6-30).
: The manuscript did not contain patients’ photos, individual details or videos.
: None.